As promised, the new iPhone system update corrects the bar signal display. Also as promised, it provides another "enhancement": Taller signal bars! Free tip: If you paint flames on the back of your iPhone 4, it runs 2.3x faster.

Yesterday, a reader claimed that—after exchanging his iPhone 4—he couldn't reproduce the sharp signal drop caused by the antenna problem. Now, some readers have confirmed the story. However, others haven't seen any improvement in their replacement units. [Updating]

We've received only one report, so take it with a hill of salt: A Gizmodo reader claims that, after Apple replaced his iPhone 4, he couldn't reproduce the sharp loss of signal. He says that the hardware seems slightly different:

Apple has deleted at least six threads talking about Consumer Reports' iPhone 4 tests. Customers on Apple's support boards were discussing the publication's negative report, which demonstrated that the design flaw could affect all users. [Updated]

AppleCare has confirmed what we already knew: The incoming software update won't fix the iPhone 4's transmission and reception problems. They acknowledged the antenna problem exists, offering the same solution as before: Buy a case or hold the iPhone differently.

The first iPhone 4 class action suit against Apple and AT&T has been filed today in the United States District Court for the District of Maryland. The lawsuit focus on the antenna design problems, making several claims: Updated

Richard Gaywood—Ph.D in wireless network planning from Cardiff University—has tested the iPhone 4 communications problem. Before, he thought there were no problems. Now, his conclusion is clear: "The iPhone 4 is a fantastic device but a lousy phone."

What a coincidence: On June 23—exactly when you first reported about the iPhone 4's antenna problem, Apple posts multiple request for antenna engineers for the iPhone. Too late? Too soon? Let the conspiracy theories begin.